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A test methodology that assumes some knowledge of the internal structure and implementation detail of the assessment object. Also known as gray box testing.
CNSSI 4009-2015 under focused testing from NIST SP 800-53A Rev. 1
NIST SP 800-53A Rev. 4 under Focused Testing
See focused testing.
NIST SP 800-53A Rev. 4 under Gray Box Testing